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Message-ID: <20191208152907.GH32275@shao2-debian>
Date: Sun, 8 Dec 2019 23:29:07 +0800
From: kernel test robot <rong.a.chen@...el.com>
To: "Paul E. McKenney" <paulmck@...nel.org>
Cc: LKML <linux-kernel@...r.kernel.org>,
Linus Torvalds <torvalds@...ux-foundation.org>,
lkp@...ts.01.org
Subject: [rcu] ed93dfc6bc: stress-ng.icache.ops_per_sec -15.0% regression
Greeting,
FYI, we noticed a -15.0% regression of stress-ng.icache.ops_per_sec due to commit:
commit: ed93dfc6bc0084485ccad1ff6bd2ea81ab2c03cd ("rcu: Confine ->core_needs_qs accesses to the corresponding CPU")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
in testcase: stress-ng
on test machine: 96 threads Intel(R) Xeon(R) Gold 6252 CPU @ 2.10GHz with 192G memory
with following parameters:
nr_threads: 100%
disk: 1HDD
testtime: 1s
class: cpu-cache
cpufreq_governor: performance
ucode: 0x500002c
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <rong.a.chen@...el.com>
Details are as below:
-------------------------------------------------------------------------------------------------->
To reproduce:
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp install job.yaml # job file is attached in this email
bin/lkp run job.yaml
=========================================================================================
class/compiler/cpufreq_governor/disk/kconfig/nr_threads/rootfs/tbox_group/testcase/testtime/ucode:
cpu-cache/gcc-7/performance/1HDD/x86_64-rhel-7.6/100%/debian-x86_64-2019-11-14.cgz/lkp-csl-2sp5/stress-ng/1s/0x500002c
commit:
516e5ae0c9 ("rcu: Reset CPU hints when reporting a quiescent state")
ed93dfc6bc ("rcu: Confine ->core_needs_qs accesses to the corresponding CPU")
516e5ae0c9401629 ed93dfc6bc0084485ccad1ff6bd
---------------- ---------------------------
%stddev %change %stddev
\ | \
39049 -15.0% 33189 ± 14% stress-ng.icache.ops_per_sec
7784 -36.6% 4939 ± 9% stress-ng.membarrier.ops
7648 -37.3% 4793 ± 9% stress-ng.membarrier.ops_per_sec
41517989 -14.4% 35523501 ± 13% stress-ng.time.minor_page_faults
245.82 ± 3% -7.5% 227.44 ± 5% stress-ng.time.system_time
48037 -29.8% 33703 ± 7% stress-ng.time.voluntary_context_switches
2047 +1.6% 2081 boot-time.idle
41603210 -14.4% 35609851 ± 13% proc-vmstat.pgfault
5619 -10.3% 5039 ± 3% vmstat.system.cs
72138 ± 96% -96.6% 2469 ± 41% sched_debug.cpu.avg_idle.min
2.20 +15.1% 2.53 ± 10% sched_debug.cpu.clock.stddev
2.20 +14.9% 2.53 ± 10% sched_debug.cpu.clock_task.stddev
41320 ± 43% +57.0% 64886 ± 24% numa-meminfo.node0.Inactive
40882 ± 44% +57.0% 64182 ± 24% numa-meminfo.node0.Inactive(anon)
40672 ± 48% +59.0% 64687 ± 27% numa-meminfo.node0.Mapped
43343 ± 46% +53.9% 66694 ± 25% numa-meminfo.node0.Shmem
9465 ± 40% +66.8% 15790 ± 26% numa-vmstat.node0.nr_inactive_anon
9494 ± 44% +68.8% 16023 ± 28% numa-vmstat.node0.nr_mapped
10835 ± 46% +53.4% 16620 ± 25% numa-vmstat.node0.nr_shmem
9477 ± 40% +66.7% 15796 ± 26% numa-vmstat.node0.nr_zone_inactive_anon
120.00 ± 59% -55.8% 53.00 ± 64% interrupts.CPU4.RES:Rescheduling_interrupts
62.00 ± 56% -57.7% 26.25 ± 6% interrupts.CPU41.RES:Rescheduling_interrupts
51.50 ± 65% -55.8% 22.75 ± 18% interrupts.CPU52.RES:Rescheduling_interrupts
112.50 ± 66% -71.6% 32.00 ± 66% interrupts.CPU76.RES:Rescheduling_interrupts
74.50 ± 35% -72.8% 20.25 ± 41% interrupts.CPU92.RES:Rescheduling_interrupts
5.04 ±116% -5.0 0.00 perf-profile.calltrace.cycles-pp.release_pages.tlb_flush_mmu.tlb_finish_mmu.exit_mmap.mmput
5.04 ±116% -5.0 0.00 perf-profile.calltrace.cycles-pp.tlb_finish_mmu.exit_mmap.mmput.do_exit.do_group_exit
5.04 ±116% -5.0 0.00 perf-profile.calltrace.cycles-pp.tlb_flush_mmu.tlb_finish_mmu.exit_mmap.mmput.do_exit
5.04 ±116% -5.0 0.00 perf-profile.children.cycles-pp.release_pages
5.04 ±116% -5.0 0.00 perf-profile.children.cycles-pp.tlb_finish_mmu
5.04 ±116% -5.0 0.00 perf-profile.children.cycles-pp.tlb_flush_mmu
5994 ± 2% -15.7% 5054 ± 2% perf-stat.i.context-switches
1466 ± 8% -32.9% 983.03 ± 8% perf-stat.i.cpu-migrations
68.06 +1.4 69.47 perf-stat.i.iTLB-load-miss-rate%
0.03 ± 3% -0.0 0.03 ± 7% perf-stat.overall.dTLB-store-miss-rate%
5741 ± 2% -15.8% 4835 ± 2% perf-stat.ps.context-switches
1407 ± 8% -33.0% 942.99 ± 8% perf-stat.ps.cpu-migrations
5131 ± 40% +186.8% 14716 ± 5% softirqs.CPU0.RCU
6347 ± 30% +185.8% 18142 ± 8% softirqs.CPU1.RCU
4632 ± 13% +203.4% 14054 ± 3% softirqs.CPU10.RCU
3655 ± 3% +269.1% 13494 ± 5% softirqs.CPU11.RCU
4011 ± 12% +251.5% 14100 ± 8% softirqs.CPU12.RCU
4456 ± 28% +216.3% 14097 ± 12% softirqs.CPU13.RCU
3751 ± 4% +259.1% 13470 ± 3% softirqs.CPU14.RCU
3909 ± 9% +247.0% 13566 ± 2% softirqs.CPU15.RCU
3976 ± 6% +235.5% 13340 ± 4% softirqs.CPU16.RCU
4211 ± 20% +245.1% 14533 ± 14% softirqs.CPU17.RCU
6063 ± 63% +124.9% 13636 ± 8% softirqs.CPU18.RCU
4362 ± 32% +230.8% 14434 ± 3% softirqs.CPU19.RCU
3999 ± 3% +256.5% 14258 ± 7% softirqs.CPU2.RCU
5407 ± 29% +176.8% 14966 ± 5% softirqs.CPU20.RCU
4034 ± 14% +254.7% 14309 ± 7% softirqs.CPU21.RCU
3920 ± 8% +245.4% 13544 softirqs.CPU22.RCU
3829 ± 5% +260.7% 13811 ± 4% softirqs.CPU23.RCU
6202 ± 57% +133.9% 14509 ± 6% softirqs.CPU24.RCU
3782 ± 7% +250.6% 13263 ± 3% softirqs.CPU25.RCU
3600 ± 4% +274.9% 13499 ± 8% softirqs.CPU26.RCU
3486 ± 2% +268.7% 12855 ± 2% softirqs.CPU27.RCU
3990 ± 9% +244.4% 13744 ± 5% softirqs.CPU28.RCU
4249 ± 19% +229.1% 13984 ± 13% softirqs.CPU29.RCU
3661 ± 2% +270.9% 13578 ± 5% softirqs.CPU3.RCU
3580 +260.4% 12904 softirqs.CPU30.RCU
3960 ± 14% +220.8% 12703 ± 2% softirqs.CPU31.RCU
15192 ± 8% -9.2% 13790 softirqs.CPU31.TIMER
5046 ± 32% +167.6% 13504 ± 5% softirqs.CPU32.RCU
3461 ± 7% +264.3% 12607 ± 3% softirqs.CPU33.RCU
3569 ± 7% +254.4% 12652 ± 3% softirqs.CPU34.RCU
3719 ± 13% +275.8% 13978 ± 16% softirqs.CPU35.RCU
3433 ± 6% +275.9% 12906 ± 5% softirqs.CPU36.RCU
3749 ± 6% +256.2% 13353 ± 7% softirqs.CPU37.RCU
3596 ± 10% +258.4% 12889 ± 5% softirqs.CPU38.RCU
4498 ± 32% +178.7% 12535 ± 4% softirqs.CPU39.RCU
4117 ± 7% +229.3% 13558 ± 6% softirqs.CPU4.RCU
3547 ± 6% +310.3% 14554 ± 8% softirqs.CPU40.RCU
3652 ± 10% +265.1% 13336 ± 3% softirqs.CPU41.RCU
3388 ± 4% +287.0% 13114 ± 8% softirqs.CPU42.RCU
3314 ± 4% +278.3% 12538 ± 5% softirqs.CPU43.RCU
3386 ± 3% +278.1% 12803 ± 4% softirqs.CPU44.RCU
3497 ± 10% +270.3% 12948 ± 5% softirqs.CPU45.RCU
3592 ± 5% +252.5% 12660 ± 2% softirqs.CPU46.RCU
3511 ± 5% +248.9% 12249 ± 3% softirqs.CPU47.RCU
3579 ± 5% +291.3% 14006 ± 8% softirqs.CPU48.RCU
3496 ± 9% +280.6% 13307 ± 4% softirqs.CPU49.RCU
3772 ± 2% +256.2% 13436 softirqs.CPU5.RCU
3703 ± 4% +262.6% 13428 ± 2% softirqs.CPU50.RCU
3512 ± 6% +271.1% 13034 ± 5% softirqs.CPU51.RCU
4027 ± 21% +229.3% 13261 ± 6% softirqs.CPU52.RCU
3517 ± 6% +324.2% 14919 ± 20% softirqs.CPU53.RCU
3730 ± 5% +255.0% 13244 ± 3% softirqs.CPU54.RCU
3542 ± 4% +277.3% 13364 ± 2% softirqs.CPU55.RCU
3591 ± 8% +279.1% 13615 ± 5% softirqs.CPU56.RCU
4717 ± 46% +173.3% 12894 ± 2% softirqs.CPU57.RCU
3311 ± 3% +304.6% 13399 ± 7% softirqs.CPU58.RCU
3613 ± 7% +278.9% 13694 ± 2% softirqs.CPU59.RCU
4223 ± 12% +224.0% 13685 ± 2% softirqs.CPU6.RCU
3909 ± 25% +232.4% 12994 ± 5% softirqs.CPU60.RCU
4343 ± 28% +207.2% 13343 ± 3% softirqs.CPU61.RCU
3477 ± 7% +281.6% 13270 ± 4% softirqs.CPU62.RCU
3362 ± 4% +328.8% 14419 ± 9% softirqs.CPU63.RCU
4015 ± 16% +236.2% 13499 ± 5% softirqs.CPU64.RCU
4687 ± 44% +179.5% 13100 ± 4% softirqs.CPU65.RCU
3714 ± 11% +267.0% 13631 ± 11% softirqs.CPU66.RCU
3438 ± 5% +287.9% 13339 ± 3% softirqs.CPU67.RCU
3819 ± 13% +251.3% 13415 ± 6% softirqs.CPU68.RCU
3302 ± 5% +305.5% 13389 ± 4% softirqs.CPU69.RCU
3919 ± 9% +244.2% 13491 ± 6% softirqs.CPU7.RCU
3456 ± 3% +292.4% 13563 ± 7% softirqs.CPU70.RCU
3709 ± 13% +295.1% 14655 ± 5% softirqs.CPU71.RCU
3105 ± 6% +332.1% 13420 ± 6% softirqs.CPU72.RCU
3317 ± 8% +289.3% 12917 ± 3% softirqs.CPU73.RCU
3286 ± 3% +281.8% 12544 ± 3% softirqs.CPU74.RCU
3243 ± 4% +282.8% 12414 ± 4% softirqs.CPU75.RCU
3195 ± 3% +285.6% 12322 ± 3% softirqs.CPU76.RCU
3243 ± 6% +274.0% 12131 ± 3% softirqs.CPU77.RCU
3322 ± 6% +273.0% 12391 ± 5% softirqs.CPU78.RCU
3207 ± 3% +293.8% 12629 ± 5% softirqs.CPU79.RCU
4374 ± 13% +215.9% 13817 softirqs.CPU8.RCU
3409 ± 11% +271.5% 12666 softirqs.CPU80.RCU
3475 ± 14% +253.7% 12290 ± 3% softirqs.CPU81.RCU
3625 ± 22% +239.7% 12315 ± 2% softirqs.CPU82.RCU
3192 ± 4% +307.2% 13000 ± 11% softirqs.CPU83.RCU
3328 ± 13% +266.4% 12194 ± 3% softirqs.CPU84.RCU
3380 ± 10% +262.0% 12238 ± 5% softirqs.CPU85.RCU
3199 ± 7% +300.8% 12822 ± 10% softirqs.CPU86.RCU
3378 ± 11% +261.3% 12205 ± 5% softirqs.CPU87.RCU
3442 ± 7% +264.2% 12538 ± 6% softirqs.CPU88.RCU
3242 ± 7% +279.7% 12313 ± 6% softirqs.CPU89.RCU
4646 ± 25% +187.7% 13366 ± 5% softirqs.CPU9.RCU
3078 ± 5% +294.0% 12129 ± 5% softirqs.CPU90.RCU
3091 ± 5% +296.0% 12242 ± 5% softirqs.CPU91.RCU
3247 ± 6% +296.6% 12876 ± 11% softirqs.CPU92.RCU
3253 ± 4% +272.5% 12120 ± 5% softirqs.CPU93.RCU
3180 ± 4% +280.6% 12103 ± 3% softirqs.CPU94.RCU
3395 ± 9% +274.1% 12701 ± 6% softirqs.CPU95.RCU
364674 +250.4% 1277851 softirqs.RCU
stress-ng.time.voluntary_context_switches
50000 +-+-----------------------------------------------------------------+
45000 +-+ ++.++ ++ ++++++++++.++++++++ + +++++++++ +++ + +++.++ +|
| : : :: : |
40000 +-+ : O O:: O : O O |
35000 +-+O: : O: O OOOOO O O OOOO O O |
| :O :OO :OO : OOO OOO O OOOOO OO |
30000 +-+ : : :: : O O |
25000 +-+ : : :: : |
20000 +-+: : : : : |
|: : : : : : |
15000 +-+: : : : : |
10000 OO+: : : : : |
|: : : : : : |
5000 +-+: : : : : |
0 +-O-O--O------------------------------------------------------------+
stress-ng.membarrier.ops_per_sec
8000 +-+------------------------------------------------------------------+
| +.+++ ++ +++++++.++++++++.+++ + ++.+++++++ +.++ + + ++.+ ++|
7000 +-+ : : :: : + |
6000 +-+ : : :: : |
| : O O:: OOO O O O O |
5000 +-+O: : O: :OOOO O O O O O O |
| : O : :O : O O OO O O O |
4000 +-+ : :OO ::O : O O OOOO O O O |
|: : : : : : |
3000 +-+: : : : : |
2000 +-+: : : : : |
|: : : : : : |
1000 +-+: : : : : |
OO : : : : : |
0 +-O-O--O-------------------------------------------------------------+
[*] bisect-good sample
[O] bisect-bad sample
Disclaimer:
Results have been estimated based on internal Intel analysis and are provided
for informational purposes only. Any difference in system hardware or software
design or configuration may affect actual performance.
Thanks,
Rong Chen
View attachment "config-5.4.0-rc1-00011-ged93dfc6bc008" of type "text/plain" (200619 bytes)
View attachment "job-script" of type "text/plain" (7859 bytes)
View attachment "job.yaml" of type "text/plain" (5505 bytes)
View attachment "reproduce" of type "text/plain" (389 bytes)
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